JP2014210998A - Ground fabric for laminate tape and laminate tape using the ground fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ground fabric for laminate tape and laminate tape using the ground fabric which is comprised of a thin and lightweight knitted fabric (knit), saves hand-tearability of a lateral direction (a width direction) while keeping strength of a lengthwise direction (a longitudinal direction), and loops are not dragged laterally and the knitted fabric is not disturbed in a production step before a resin layer is laminated and the knitted fabric is fixed.SOLUTION: In a warp knit fabric, warp group standing in a row to a lengthwise direction of a knitted fabric forms loops continuing lengthwise, each loop comprising wale formed on the warp knit fabric is joined to other loops comprising other wales by the warp, and the warp knit fabric consists from a weft inserted knitted fabric that weft which fineness is thicker than the warps are held by each sinker loop as if sewing between the warps forming each loop of the warp knit fabric.

Description

  The present invention relates to a laminate tape base fabric. The present invention also relates to a laminate tape using the base fabric. For example, the present invention relates to a laminating tape that has good hand tearability at an arbitrary position, such as an adhesive tape for packing, and that requires a predetermined strength in the longitudinal direction and followability to an article to be adhered.

  At present, adhesive tape is used in place of conventional ropes and strings in packing and packing operations using cardboard boxes. For these adhesive tapes, for example, laminate tape (industry name) in which polyethylene resin layer is laminated on fabric using rayon spun yarn, rayon multifilament yarn, flat yarn (slit yarn or split yarn), etc. is used. Has been.

  These laminating tapes are woven with a warp finer than a weft fineness in order to maintain horizontal (longitudinal) strength while ensuring horizontal (widthwise) hand tearability. Woven fabrics are used as the base fabric. As a result, the tear strength of the warp is low, the tear strength of the weft is high, and the hand cutting property in the horizontal direction (width direction) is improved.

  These laminate tape base fabrics are required to be thin and lightweight. However, thinness and lightness are limited in woven fabrics, especially in plain woven fabrics using rayon spun yarn. Therefore, a laminate tape base fabric using a thin, lightweight knitted fabric (knit) having a large porosity has been proposed.

  For example, the laminate tape base fabric shown in the following Patent Document 1 to which the applicant of the present invention has a right is a flat yarn over the entire width of a large number of parallel independent chain braids (wales) formed of multifilament warps. It is formed with the warp knitted fabric in which the horizontal insertion yarn is inserted.

Japanese Patent No. 3388315

  By the way, in the above-mentioned patent document 1, a polyester multifilament is used for the warp, and a polyolefin flat yarn is used for the weft, and it is thin and lightweight, and has a good horizontal direction (width direction) hand cutting property. A cloth can be constructed.

  However, in the laminate tape base fabric of Patent Document 1, each loop constituting the independent chain knitting is connected only to the vertical direction in the same wale and is not connected to other wales in the horizontal direction, Moreover, the weft thread that is inserted over the entire width is composed of a flat yarn having slipperiness.

  Therefore, in the manufacturing stage from knitting the warp knitted fabric to laminating the polyethylene resin layer etc. and fixing the knitted fabric, the loops of each independent chain knitting are displaced in the horizontal direction along the flat yarn. There was a problem that the ground was disturbed.

  In view of the above, the present invention is made up of a thin and lightweight knitted fabric (knit), and maintains the strength in the vertical direction (longitudinal direction) while cutting in the horizontal direction (width direction). Laminate tape base fabric and laminate using the base fabric in which the loop is not displaced in the horizontal direction and the knitted fabric is not disturbed in the production stage until the knitted fabric is fixed by laminating the resin layers The purpose is to provide a tape.

  In solving the above problems, the present inventor, as a result of diligent research, adopted a knitted fabric in which the respective wales are appropriately connected in the transverse direction as the warp knitted fabric, so that each loop constituting the warp knitted fabric has a weft yarn. As a result, the present invention has been completed.

That is, according to the description of claim 1, the laminate tape base fabric according to the present invention,
A warp knitted fabric in which warp groups arranged in parallel in the length direction of the knitted fabric form loops continuously in the warp direction
Each loop constituting the wale formed on the warp knitted fabric is connected to another loop constituting another wale by the warp,
It is characterized by comprising a weft insertion knitted fabric in which wefts having a fineness larger than that of the warp yarn are held by each sinker loop so as to sew between the warp yarns forming each loop of the warp knitted fabric.

Moreover, according to the description of claim 2, the present invention is the laminate tape base fabric according to claim 1,
The warp knitted fabric is a denby knitted fabric.

Moreover, according to the description of Claim 3, this invention is the base fabric for laminate tapes of Claim 1 or 2,
The warp is made of a multifilament yarn, and the weft is made of a flat yarn or a multifilament yarn.

Moreover, according to the description of Claim 4, this invention is the base fabric for laminate tapes of Claim 3,
The warp is a multifilament yarn made of a polyester resin, and the weft is a flat yarn made of a polyolefin resin.

Moreover, according to the description of Claim 5, this invention is the base fabric for laminate tapes of Claim 3,
The warp is a multifilament yarn made of polyester resin, and the weft is a multifilament yarn made of polyester resin.

Moreover, according to the description of claim 6, the laminate tape according to the present invention,
The resin layer is formed in the single side | surface or both surfaces with respect to the base fabric for laminate tapes as described in any one of Claims 1-5.

Moreover, according to the description of Claim 7, this invention is the laminate tape of Claim 6,
The resin forming the resin layer is a polyolefin resin.

Moreover, according to the description of Claim 8, this invention is the laminate tape of Claim 6 or 7,
The tensile strength in the warp direction (strength for pulling the warp) is 70% or less of the tensile strength in the horizontal direction (strength for pulling the weft).

Moreover, according to the description of Claim 9, this invention is the laminate tape of Claim 6 or 7,
The warp yarn tear strength (the strength to tear across the warp) is 70% or less of the weft tear strength (the strength to tear across the weft).

Moreover, according to the description of claim 10, the laminate tape according to the present invention is
The adhesive resin layer is formed in the single side | surface or both surfaces of the laminate tape as described in any one of Claims 6-9.

  According to the said structure, the base fabric for laminate tapes which concerns on this invention is comprised by the thin and lightweight warp knitted fabric (knit). Further, in this warp knitted fabric, each loop constituting the wale formed on the knitted fabric is connected to another loop constituting another wale by warp forming the loop. As a result, the parallel wales are connected to each other appropriately, and the knitted fabric is not disturbed.

  Further, in this knitting structure, wefts having a fineness greater than warp are inserted and held in each sinker loop so as to sew between warp yarns forming each loop of the warp knitted fabric. As a result, it is possible to increase the transverse direction (width direction) strength of the laminate tape and to maintain the transverse direction (longitudinal direction) strength, while ensuring the hand cutting property in the transverse direction (width direction). it can.

  Moreover, according to the said structure, you may make it employ | adopt a Denby knitted fabric as a warp knitted fabric. As a result, the loops constituting the warp knitted fabric are connected to other adjacent loops in the horizontal direction, and the loops are not shifted in the horizontal direction along the horizontal thread in which the loops are inserted.

  Moreover, according to the said structure, in the base fabric for laminate tapes which concerns on this invention, you may make it use a multifilament yarn as a warp. Further, a flat yarn or a multifilament yarn may be used as the weft. As a result, the laminate tape base fabric becomes thinner and lighter. Further, it is possible to further improve the hand cutting property in the horizontal direction (width direction) while increasing the strength in the horizontal direction (width direction) and maintaining the strength in the vertical direction (longitudinal direction).

  The warp may be a multifilament yarn made of a polyester resin. On the other hand, the weft may be a flat yarn made of polyolefin resin or a multifilament yarn made of polyester resin.

  Moreover, according to the said structure, the resin layer is formed in the single side | surface or both surfaces with respect to the base material for laminate tapes of the laminate tape which concerns on this invention. A polyolefin resin may be employed as the resin for forming this resin layer.

  Moreover, according to the said structure, the tensile strength (strength which pulls a warp) of the laminate tape which concerns on this invention is 70% or less of the tensile strength (strength which pulls a weft) of a horizontal direction. Preferably there is. Alternatively, the warp yarn tear strength (the strength to tear across the warp) of the laminate tape according to the present invention is 70% or less of the weft tear strength (the strength to tear across the weft). Preferably there is.

  Thus, if the balance between the strength in the vertical direction and the strength in the horizontal direction is such, the hand cutting property in the horizontal direction (width direction) is further improved while maintaining the strength in the vertical direction (longitudinal direction). be able to.

  Therefore, according to the present invention, it is composed of a thin and lightweight knitted fabric (knit), and while maintaining the strength in the warp direction (longitudinal direction), it ensures the cutability in the transverse direction (width direction) and the resin layer. Thus, it is possible to provide a laminate tape base fabric and a laminate tape using the base fabric in which the loop is not shifted in the horizontal direction and the knitted fabric is not disturbed in the manufacturing stage until the knitted fabric is fixed by laminating the fabrics.

It is the schematic which shows the knitting structure of the base fabric for laminate tapes concerning one Embodiment of this invention. FIG. 2 is a schematic view showing a state in which each loop is extended in a laminate tape base fabric knitted with the knitting structure of FIG. 1. It is a photograph which shows the surface state of the laminate tape produced by laminating | stacking a resin layer on the base fabric for laminate tapes knitted by the knitting structure | tissue of FIG.

  Hereinafter, the present invention will be described in detail. In the present embodiment, the laminate tape will be described as an example of an adhesive tape having an adhesive resin layer formed on one side, such as packaging, or a double-sided tape having an adhesive resin layer formed on both sides. Such a laminate tape is not limited to this.

  In the present invention, the warp knitted fabric is not particularly limited as long as it is a knitted fabric in which warp groups arranged in parallel in the length direction of the knitted fabric continuously form a loop in the warp direction. A knitted fabric knitted with a knitting machine, a raschel knitting machine, or a Milanese knitting machine, and a denby knitted fabric (also called a tricot knitted fabric) such as a single denby knitted fabric or a double denby knitted fabric, a single cord knitted fabric or a double cord. Examples thereof include cord knitted fabric such as knitted fabric, and atlas knitted fabric such as single atlas knitted fabric and double atlas knitted fabric.

  However, independent chain knitting (also called chain stitch) cannot be adopted in the warp knitted fabric. This is because each loop constituting the knitted fabric is connected only in the vertical direction and not in the horizontal direction. As described above, in the above-mentioned Patent Document 1 to which the applicant of the present invention has a right, independent chain knitting is adopted from the standpoint of ensuring hand cutting at an arbitrary position. However, in the present invention, as described below, it is possible to ensure the same hand cutting property in a specific warp knitted fabric.

  In the present invention, it is particularly preferable to employ a denby knitted fabric among the warp knitted fabrics. As the denby knitted fabric, either a single denby knitted fabric or a double denby knitted fabric may be adopted. The denby knitted fabric can ensure the stability of the knitted fabric and a certain level of strength even when a thin warp is used, and can form a thin and durable knitted fabric. As a result, the knitted laminate tape base fabric can be made thin and light. Further, the denby knitted fabric is characterized in that adjacent loops are connected with the same warp, and the knitted fabric is strong in both the vertical and horizontal directions and is not easily disturbed.

  For example, even in the case where a flat yarn having slipperiness is adopted for the wefts inserted over the entire width, in the manufacturing stage from knitting the warp knitted fabric to laminating a polyethylene resin layer etc. and fixing the knitted fabric The loops are not displaced in the horizontal direction along the flat yarn, and the knitted fabric is not disturbed. As a result, the number of wefts inserted over the entire width can be reduced, and a knitted fabric that is thinner and lighter than conventional ones can be knitted.

  Hereinafter, in this embodiment, a denby knitted fabric (specifically, a single denby knitted fabric) will be described as an example of the warp knitted fabric. FIG. 1 is a schematic diagram showing a knitted structure of a laminate tape base fabric according to this embodiment. In FIG. 1, a knitted fabric (10) forming a base fabric for a laminate tape is composed of a warp yarn (11) and a weft yarn (12), and this warp yarn (11) forms a loop (20) constituting the foundation of the knitted fabric. To do.

  In FIG. 1, a weft insertion knitted fabric composed of a denim knitted fabric of 4 wales (vertical heel) × 6 course (horizontal heel) is shown. Each wale (30) and each course (40) are further knitted in the vertical and horizontal directions to form a wide and long knitted fabric. In FIG. 1, four warps (11) arranged in parallel in the warp direction each form a loop (20) while extending upward in the drawing.

  Here, the movement of the warp (11) will be described for one loop (20). First, the warp (11) extends upward in the figure to form an upwardly protruding needle loop (21). Thereafter, the warp yarn (11) extends downward and passes through (becomes through) the needle loops of other loops below to form a convex sinker loop (22). Thereafter, the warp (11) passes through (becomes through) the needle loops of other adjacent loops, and further extends upward to form the next needle loop.

  In this way, each warp yarn (11) forms a loop (20) and a knitted fabric (10) while being connected to the loop via an adjacent loop. As a result, the knitted fabric (10) shown in FIG. 1 forms four wales that run in the vertical direction and six courses that run in the horizontal direction. In the present embodiment, each loop of the denby knitted fabric is formed with a closed stitch, but the present invention is not limited to this and may be formed with an open stitch.

  In the present embodiment, the loop length (major axis) of each loop (20) is not particularly limited, but is preferably 1 to 6 mm, for example. Further, the density of the wale is preferably 8 to 28 pieces / inch, and more preferably 12 to 28 pieces / inch. The density of the course is preferably 4-25 lines / inch, and more preferably 8-25 lines / inch. When the density of the wale and the course is low, the strength of the knitted fabric cannot be obtained. On the contrary, when the density of the wale and the course is high, the strength of the knitted fabric increases, but the knitted fabric becomes thick and heavy, and the production cost also increases.

  As described above, in this embodiment, each loop that constitutes each wale running in the vertical direction is connected to another loop that constitutes another wale, and the loop does not shift along the inserted weft. The stitch is not disturbed. Note that the knitted fabric of the present embodiment is different from the independent chain knitting in Patent Document 1 described above in that the left and right loops are connected by warps. However, when one warp forms one loop, it overlaps in the warp direction three times (three), and when the knitted fabric is torn in the transverse direction (width direction) (See FIG. 1 and FIG. 1 of Patent Document 1).

  As a result, the laminate tape base fabric according to the present embodiment secures hand cutability in the horizontal direction (width direction), and loops are produced in the manufacturing stage until the knitted fabric is fixed by laminating the resin layers. The knitted fabric is not disturbed by shifting in the horizontal direction.

  On the other hand, with the formation of the knitted fabric (10), the weft yarn (12) having a fineness greater than that of the warp yarn (11) is inserted so as to sew between the warp yarns (11) forming each loop. In FIG. 1, weft yarns (12) are inserted on the front side of the four needle loops (21) arranged in parallel in each course. The four warp yarns (11) formed with four needle loops (21) from this weft yarn (12) form a sinker loop (22), and the weft yarn (12) extends from the lower side toward the front side of the weft yarn (12). 12). That is, the weft yarn (12) is held by each warp yarn (11) bent in a V shape forming each sinker loop (22).

  Thus, when the weft yarn (12) having a finer thickness than the warp yarn (11) is inserted, the transverse strength of the knitted fabric (10) becomes stronger than the longitudinal strength, and the laminate tape is torn. In addition, it is difficult to tear in the vertical direction (longitudinal direction), and can be easily torn in the horizontal direction (width direction). Accordingly, it is possible to ensure the hand cutting property in the horizontal direction (width direction) while maintaining the strength in the vertical direction (longitudinal direction) of the laminate tape.

  Here, in the present invention, the material and shape of the warp are not particularly limited. However, since the laminate tape is thin and lightweight, it is a multifilament yarn made of synthetic fiber, semi-synthetic fiber or regenerated fiber, or monofilament. It is preferred to use yarn. In particular, it is more preferable to employ a multifilament yarn in which thin long fibers are bundled in order to maintain the strength in the vertical direction (longitudinal direction) of the laminate tape and ensure the flexibility of the laminate tape.

  Examples of materials of these multifilament yarns or monofilament yarns include polyester resins, nylon resins, acetate resins, and cellulose resins. In the present embodiment, among these, it is preferable to employ a multifilament yarn made of a polyester resin from the viewpoints of strength, water resistance, adhesiveness of resin layers to be laminated, availability, and cost. The single filament fineness and the number of the multifilament yarns may be appropriately selected depending on the application.

  On the other hand, in the present invention, it is sufficient that the weft has a finer and stronger strength than the warp, and the material and shape thereof are not particularly limited. However, it is preferable to use a multifilament yarn, a monofilament yarn, a flat yarn, or the like made of synthetic fiber, semi-synthetic fiber or regenerated fiber because the laminated tape is thin and light also in the weft. In particular, it is preferable to employ a multifilament yarn or a flat yarn having a fineness greater than that of the warp in order to increase the transverse strength (width direction) of the laminate tape and ensure the flexibility of the laminate tape.

  Here, the flat yarn is a tape-like yarn obtained by slitting a resin film stretched in the vertical direction to a predetermined width, or a tape-like yarn obtained by slitting the resin film to a predetermined width and then drawn in the vertical direction. It is also called a slit yarn or tape yarn.

  Examples of materials for these multifilament yarns or flat yarns include polyester resins, nylon resins, acetate resins, and cellulose resins. In the present embodiment, among these, a multifilament yarn made of a polyester resin or a flat yarn made of a polyolefin resin in terms of strength, water resistance, adhesiveness of a resin layer to be laminated, availability, and cost. Is preferably adopted.

  Furthermore, in addition to being light in weight, flat yarns made of polyolefin resins such as polyethylene and polypropylene can obtain commercially available products at low cost from transparent ones to colored ones. In particular, by adopting a flat yarn slit through a stretched high-density polyethylene (HDPE) film, it is possible to suppress the elongation of the flat yarn and improve the tearability, and to provide sufficient strength even if the fineness is reduced to some extent. Can be secured. As a result, there is an advantage that the laminate tape is thin and light, and the surface pattern of the laminate film is excellent in design due to the smoothness of the flat yarn.

  In the present embodiment, the knitted fabric is made of Denby knitted fabric, and the loop formed by the warp yarn does not shift along the inserted flat yarn. Therefore, it is not necessary to specifically limit the width of the flat yarn with respect to the loop length (major axis). The width of the flat yarn may be appropriately selected to have a strength required in relation to the density of the wale, the density of the course, and the strength of the warp.

  Moreover, by using a flat yarn as the weft, the knitted fabric can be made thinner and smoother. This improves the adhesion between the knitted fabric and the resin layer when the resin layers are laminated. Moreover, when used for an adhesive tape, the smoothness (uniformity) of the pressure-sensitive adhesive layer increases, and as a result, the amount of adhesive used can be reduced. Furthermore, since the number of wefts to be inserted can be reduced, the productivity of the knitted fabric is improved.

  The fineness and strength of the warp and weft are related to the knitting structure, the density of the wale, the density of the course, etc., but in the weft insertion knitted fabric made of Denby knitted fabric in this embodiment, it should be as follows. Is preferred.

  For example, when a multifilament yarn made of a polyester resin is used as the warp, the fineness thereof is 10 to 110 dtex (decitex), preferably 20 to 80 dtex, and more preferably 30 to 60 dtex. On the other hand, when a flat yarn made of polyethylene resin is employed, the fineness thereof is 200 to 450 dtex, preferably 250 to 400 dtex, and more preferably 280 to 380 dtex.

  Thus, the base fabric for laminate tapes according to the present embodiment can be obtained by knitting with the knitting structure shown in FIG. However, FIG. 1 is merely a knitted structure, and in an actual knitted fabric, warp yarns are pulled in both the warp and weft directions when laminating resin layers, so that the formed loop is stretched as shown in FIG. Two wefts are held in a diamond having four vertices at the tangled points of the needle loop and sinker loop.

  FIG. 2 is a schematic diagram for showing a state in which the loop is stretched, and the states of the warp and the weft in the laminate tape manufactured by actually laminating a resin layer according to an example described later are shown in FIG. As shown in the photograph, a regular pattern is formed.

  Here, the process of laminating a resin layer on the surface of the laminate tape base fabric obtained as described above to produce a laminate tape will be described. In the present embodiment, the step of forming the resin layer on the knitted fabric is not different from the step of forming the resin layer on the plain woven fabric which is a conventional base fabric for laminate tape or the knitted fabric of Patent Document 1, What is necessary is just to make it by the method similar to the past.

  In the present invention, this process is called laminating (industry custom), but it is not limited to general laminating (cloth and cloth, cloth and film, etc.), but this should be interpreted widely. All steps of forming a resin layer on one side or both sides of the knitted laminate tape base fabric shall be included. For example, a method of adhering a resin film to a knitted fabric with an adhesive or heat fusion, a method of adhering a thermoplastic resin to a knitted fabric while extruding it by a T-die method, etc., and coating or dipping a resin liquid on the knitted fabric And a method of forming a resin layer.

  For example, when the laminate tape produced in this way is used for an adhesive tape, it has a good hand-cut property in the horizontal direction (width direction) at an arbitrary position, and has a predetermined strength in the longitudinal direction and the adherend. Followability is required. Accordingly, in the laminate tape according to the present embodiment, the fineness and strength of the warp and weft, the knitting structure, the density of the wale, the density of the course, and the like are adjusted in consideration of the ratio of the longitudinal strength to the transverse strength. It is necessary.

  In the present embodiment, the tensile strength in the warp direction (strength for pulling the warp) is preferably 70% or less of the tensile strength in the horizontal direction (strength for pulling the weft). In particular, the warp tear strength (the strength to tear across the warp) is 70% or less of the weft tear strength (the strength to tear across the weft), preferably 60% or less. It is more preferable that By such an intensity ratio, the hand cutting property in the horizontal direction (width direction) of the laminate tape is improved.

  Furthermore, in the present embodiment, an adhesive tape or a double-sided tape in which an adhesive resin layer is formed on one or both sides of the laminate tape produced as described above is also referred to as a laminate tape. In addition, the cross-sectional shape of the various laminated tapes produced in this way is not different from the cross-sectional shape of the conventional laminated tape. For example, this is the same as the cross-sectional views of FIGS.

  Next, the laminate tape base fabric according to the present invention and the laminate tape using the base fabric according to the present invention will be described in detail. In addition, this invention is not limited only to a following example.

  In this example, a 33 dtex / 12 filament multifilament yarn made of polyester resin was used as the warp. The tensile strength and elongation of this multifilament yarn (based on JIS L1013) were tensile strength: 1.3 N and elongation: 28.5%. Meanwhile, a 1.4 mm wide 333 dtex flat yarn made of transparent polyethylene resin was used as the weft. The tensile strength and elongation (in accordance with JIS L1013) of this multifilament yarn was tensile strength: 14.3 N, and elongation: 28.4%.

  The knitting structure is a knitted yarn insertion knitted fabric made of the denby knitted fabric (specifically, a single denby knitted fabric) shown in FIG. 1, with a wale density of 24 / inch and a course density of 14 / inch. One flat yarn was inserted into each course, and the laminate tape base fabric of Example 1 was knitted.

  Next, a resin layer was formed on both the front and back surfaces of the knitted laminate tape base fabric to prepare a laminate tape. A polyethylene resin was used for the resin layer, and first, a transparent polyethylene resin layer extruded from a T-die was laminated on one side of a laminate tape base fabric. Further, a polyethylene resin layer extruded from the T die was laminated on the opposite surface in the same manner. The laminated resin layers had a thickness of 30 μm on both the front and back surfaces.

  The laminate tape thus produced has a resin layer laminated in spite of the fact that the number of inserted weft yarns has been reduced to 14 because 17 was the practical limit (for example, in Patent Document 1). In the manufacturing stage until the knitted fabric was fixed, the loop did not shift in the horizontal direction and the knitted fabric was not disturbed. Further, the obtained laminate tape was thin and lightweight, and had flexibility and sufficient strength.

  A photograph of the surface shape of the laminated tape after the resin layer is formed is shown in FIG. FIG. 3 is a photograph taken with black paper placed on the background of a laminate tape, and the state of a transparent flat yarn (weft) and a multifilament yarn (warp) that appears white can be grasped. In FIG. 3, the formed loop is stretched to form a regular pattern in which two wefts are held in a rhombus whose four vertices are the intertwining points of the needle loop and the sinker loop. It has become an excellent laminate tape. Further, as can be seen from FIG. 3, each wal and each course of the knitted fabric are connected to each other, and it can be seen that the knitted fabric is not disturbed when the resin layers are laminated.

  Next, the tensile strength and elongation (according to JIS Z1524: test piece width 25 mm) and tear strength (according to JIS Z1524: Elemendorf method) of the obtained laminate tape were measured. Table 1 shows the measurement results.

  In Table 1, the value of “vertical / horizontal” indicates the ratio of the tensile strength in the vertical direction to the tensile strength in the horizontal direction in terms of tensile strength, and in the tensile strength, the value of the vertical yarn pulling in relation to the horizontal tensile strength. It represents the ratio of tension. From Table 1, it can be seen that the tensile strength in the warp direction (strength for pulling the warp) of the laminate tape is 70% or less of the tensile strength in the horizontal direction (strength for pulling the weft). Moreover, it turns out that the warp yarn tear strength (strength to tear across the warp) is 70% or less of the weft tear strength (strength to tear across the weft).

  As described above, the values of “vertical / horizontal” in Table 1 are 70% or less, respectively, so that the horizontal (longitudinal) strength is maintained while the horizontal (longitudinal) strength is cut. It shows the performance that can secure the performance. Moreover, when it was actually used and the hand cutting property in the horizontal direction (width direction) was confirmed, it could be cut smoothly in the horizontal direction, and it was good that it did not tear in the vertical or diagonal direction.

  As described above, according to the present invention, a thin and lightweight knitted fabric (knit) is used, and the horizontal direction (longitudinal direction) strength is maintained while the horizontal direction (width direction) hand cutting property is ensured. And a laminate tape base fabric in which the loop is not shifted in the horizontal direction and the knitted fabric is not disturbed in the manufacturing stage until the knitted fabric is fixed by laminating the resin layers, and a laminate tape using the base fabric. be able to.

In implementing the present invention, not only the above-described embodiment but also the following various modifications can be mentioned.
(1) In the above embodiment, an adhesive tape or a double-sided tape will be described as an example of a laminate tape. However, the present invention is not limited to this and can be applied to decorative ribbons and other uses. 2) In the above embodiment, when the resin layer is formed on the surface of the laminate tape base fabric, a step of adhering the polyethylene resin to the knitted fabric while being extruded by the T-die method is adopted, but the present invention is not limited to this. Further, a coating process, a dipping / nip dipping process, or the like may be employed.
(3) In the above embodiment, one weft is inserted into each course of the denby knitted fabric, but the present invention is not limited to this. . A plurality of wefts may be inserted into one course.
(4) In the above embodiment, a transparent flat yarn is used as the weft. However, the present invention is not limited to this, and a colored flat yarn or a dyed multifilament yarn (warp yarn) may be used. In this case, it is possible to provide a laminate tape that is further excellent in design.
(5) In the above embodiment, the transparent polyethylene resin layer extruded from the T-die is laminated on the laminate tape base fabric. However, the present invention is not limited to this, and a colored resin layer may be laminated. In this case, it is possible to provide a laminate tape that is further excellent in design.
(6) Although the denby knitted fabric is adopted as the knitted fabric in the above embodiment, the present invention is not limited to this, and other vertical knitted fabrics such as a cord knitted fabric and an atlas knitted fabric may be adopted.

10 ... Knitted fabric, 11 ... Warp, 12 ... Weft, 20 ... Loop, 21 ... Needle loop,
22 ... Sinker loop, 30 ... Wale, 40 ... Course.

Claims (10)

A warp knitted fabric in which warp groups arranged in parallel in the length direction of the knitted fabric form loops continuously in the warp direction
Each loop constituting the wale formed on the warp knitted fabric is connected to another loop constituting another wale by the warp,
A laminate comprising a weft insertion knitted fabric in which wefts having a finer diameter than the warp are held in each sinker loop so as to sew between the warps forming each loop of the warp knitted fabric Tape base fabric.   The base fabric for laminate tape according to claim 1, wherein the warp knitted fabric is a denby knitted fabric.   The base fabric for laminate tape according to claim 1 or 2, wherein the warp is made of a multifilament yarn, and the weft is made of a flat yarn or a multifilament yarn.   4. The laminate tape base fabric according to claim 3, wherein the warp is a multifilament yarn made of a polyester resin, and the weft is a flat yarn made of a polyolefin resin.   4. The laminate tape base fabric according to claim 3, wherein the warp is a multifilament yarn made of polyester resin, and the weft is a multifilament yarn made of polyester resin.   A laminate tape in which a resin layer is formed on one side or both sides of the laminate tape base fabric according to any one of claims 1 to 5.   The laminate tape according to claim 6, wherein the resin forming the resin layer is a polyolefin resin.   The laminate according to claim 6 or 7, wherein the tensile strength in the vertical direction (strength for pulling the warp) is 70% or less of the tensile strength in the horizontal direction (strength for pulling the weft). tape.   The warp yarn tear strength (strength to tear across the warp) is 70% or less of the weft tear strength (strength to tear across the weft). Or the laminate tape according to 7.   A laminate tape comprising an adhesive resin layer formed on one side or both sides of the laminate tape according to any one of claims 6 to 9.

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